Actuating assembly for a centrally syncronised dual-clutch transmission

Abstract

An actuating assembly for actuating synchronizing elements of a centrally synchronized dual-clutch transmission having at least a first part-transmission ( 6 ) and a second part-transmission ( 7 ) such that at least one synchronizing element is associated with each of the first and the second part-transmission ( 6, 7 ). A common actuator ( 1 ) is provided for actuating at least the synchronizing elements of the two part-transmissions.

The invention claimed is: 
     
       1. An actuating assembly for actuation of a synchronization unit of a centrally synchronized dual-clutch transmission with at least a first part-transmission ( 6 ) and a second part-transmission ( 7 ) such that a synchronizing element is associated with each of the first and the second part-transmissions ( 6 ,  7 ), and
 a common actuator ( 1 ) actuating at least the synchronizing elements of the first and the second part-transmissions, the common actuator being movable, from a null position, in one of a linear and a rational first direction and an opposite second direction such that the synchronizing element of the first part transmission is actuated by movement of the common actuator in the first direction away from the null position and the synchronizing element of the second part transmission is actuated by movement of the common actuator in the second direction away from the null position. 
 
     
     
       2. The actuating assembly according to  claim 1 , wherein at least one transmission element connects the common actuator ( 1 ) and the respective synchronizing element concerned, and transmits movement of the common actuator ( 1 ) to the respective synchronizing element concerned. 
     
     
       3. The actuating assembly according to  claim 2 , wherein the transmission element is two lever elements ( 8 ,  8 ′), each lever elements ( 8 ,  8 ′) is associated with one synchronizing element, and the two lever elements ( 8 ,  8 ′) are, in each case, actuatable via a push-rod ( 9 ,  9 ′) by a toothed segment disk ( 10 ) driven by the common actuator ( 1 ). 
     
     
       4. The actuating assembly according to  claim 3 , wherein the common actuator ( 1 ) is an electric motor ( 2 ) and comprises a splined output shaft ( 3 ) which engages with teeth ( 11 ) of a toothed segment disk ( 10 ), and a rotational axle ( 12 ) of the toothed segment disk ( 10 ) is provided with receiving sections ( 13 ,  14 ) which are, respectively, in active connection with the associated lever elements ( 8 ,  8 ′) via the push-rods ( 9 ,  9 ′). 
     
     
       5. The actuating assembly according to  claim 4 , wherein pivoting axles ( 15 ,  15 ′) of the respective lever elements ( 8 ,  8 ′) are fixed, at an end remote from the toothed segment disk ( 10 ), to a housing. 
     
     
       6. The actuating assembly according to  claim 5 , wherein an end of the synchronizing element made as a band brake ( 4 ,  5 ), fixed to the housing, is held at another end of each lever element ( 8 ,  8 ′) such that a movable end of the band brake ( 4 ,  5 ) is attached to the respective lever element ( 8 ,  8 ′) between the two ends. 
     
     
       7. An actuating assembly for actuation of a synchronization unit of a centrally synchronized dual-clutch transmission with at least a first part-transmission ( 6 ) and a second part-transmission ( 7 ) such that a synchronizing element is associated with each of the first and the second part-transmissions ( 6 ,  7 ),
 a common actuator ( 1 ) actuating at least the synchronizing elements of the first and the second part-transmissions, the common actuator being movable, from a null position, in a first direction and a second direction such that the synchronizing element of the first part transmission is actuated by movement of the common actuator in the first direction, away from the null position, and the synchronizing element of the second part transmission is actuated by movement of the common actuator in the second direction, away from the null position, 
 at least one transmission element connects the common actuator ( 1 ) and the respective synchronizing element concerned, and transmits movement of the common actuator ( 1 ) to the respective synchronizing element concerned, and 
 the transmission element is a dual-eccentric shaft ( 20 ) which rotates about a rotational axis and comprises at least two eccentrics ( 16 ,  17 ) that are respectively connected, in each case, to a movable end of one of the synchronizing elements which is made as a band brake ( 4 ,  5 ). 
 
     
     
       8. The actuating assembly according to  claim 7 , wherein the synchronizing elements are, in each case, associated with a gearwheel of the respective first and the second part-transmissions ( 6 ,  7 ) with a highest transmission ratio. 
     
     
       9. The actuating assembly according to  claim 7 , wherein the actuator ( 1 ) is arranged either substantially parallel or perpendicular to countershafts (w_v 1 , w_v 2 ) and transmission input shafts (w_K 1 , w_K 2 ) of the part-transmissions ( 6 ,  7 ). 
     
     
       10. The actuating assembly according to  claim 7 , wherein each of the synchronizing elements is arranged concentrically with a respective internal shifting device on a countershaft (w_v 1 , w_v 2 ). 
     
     
       11. The actuating assembly according to  claim 7 , wherein the common actuator ( 1 ) is one of an electric motor ( 2 ), an electromagnet unit and a cylinder-piston unit. 
     
     
       12. The actuating assembly according to  claim 7 , wherein the common actuator ( 1 ) is either an electric rotary motor or an electric linear motor. 
     
     
       13. The actuating assembly according to  claim 7 , wherein each part-transmission ( 6 ,  7 ) is associated with at least one of a respective transmission brake and a clutch as the synchronizing element. 
     
     
       14. The actuating assembly according to  claim 13 , wherein the transmission brake is one of a band brake ( 4 ,  5 ), a disk brake and a cone brake. 
     
     
       15. The actuating assembly according to  claim 13 , wherein the clutch is at least one of a cone clutch and a disk clutch. 
     
     
       16. An actuating assembly for synchronizing a centrally synchronized dual-clutch transmission with at least a first part-transmission ( 6 ) and a second part-transmission ( 7 ), the assembly comprising:
 a first band brake ( 4 ) for synchronizing the first part-transmission ( 6 ); 
 a second band brake ( 5 ) for synchronizing the second part-transmission ( 7 ); 
 an electric motor ( 2 ) comprising an output shaft ( 3 ) which engages and rotationally drives a toothed disk segment ( 10 ) about an axle ( 12 ) in first and second rotational directions; 
 first and second transmission elements, each engaging the toothed disk segment ( 10 ) and one of the first and the second band brakes ( 4 ,  5 ) such that as the toothed disk segment ( 10 ) rotates in the first rotational direction, the toothed disk segment ( 10 ) drives the first transmission element which actuates the first band brake ( 4 ) to synchronize the first part-transmission ( 6 ) and as the toothed disk segment ( 10 ) rotates in the second rotational direction, the toothed disk segment ( 10 ) drives the second transmission element which actuates the second band brake ( 5 ) to synchronize the second part-transmission ( 7 ).